Skip to main content

Table 2 Conventional Testing Regime: Public Sexual Health Clinic Setting (Funded by State Government)

From: Economic evaluation of alternative testing regimes and settings to detect undiagnosed HIV in Australia

  True HIV Positive (PHIV ) True HIV Negative (1 − PHIV)
Outcomes HIV Positive
(EIA+ & WB+)
False HIV Negative
(EIA-)
False HIV Positive
(EIA+ & WB-)
True HIV Negative
(EIA-)
Probability of result (PHIVSenEIASenWB ) (PHIV (1 − SenEIA)) ((1 − PHIV)  (1 − SpecEIA) SpecWB) (1 − PHIV) SpecEIA
Inputs
Visit 1: Initial Screening
  Consult time 30 Min 30 Min 30 Min 30 Min
  Staff Wage (Rate/Hour): $45.12 $45.12 $45.12 $45.12
  Staffing Clinical Nurse Clinical Nurse Clinical Nurse Clinical Nurse
Pathology costs
  EIA $18.54 $18.54 $18.54 $18.54
  WB confirmatory $84.54   $84.54  
Visit 2: Test Results
  Consult time 60 Min 30 Min 30 Min 30 Min
  Staff Wage (Rate/Hour): $78.00 $45.12 $45.12 $45.12
  Staffing Staff specialist
(Level 18)
Clinical Nurse Clinical Nurse Clinical Nurse
Total Cost of Each Outcome $203.64 $63.67 $148.21 $63.67
Average cost per person tested =(PHIVSenEIASenWB) AC per True HIV PositiveEIA + , WB+ + (PHIV (1 − SenEIA)) AC per False HIV NegativeEIA + ((1 − PHIV) SpecEIA) AC per True HIV NegativeEIA + ((1 − PHIV)  (1 − SpecEIA) SpecWB)) AC per False HIV PositiveEIA + , WB
Average number of tests for a positive diagnosis \( =\frac{1}{P_{HIV}\ast Se{n}_{EIA}\ast Se{n}_{WB}} \)
  1. Note: AC Average Cost, EIA fourth generation enzyme immunoassay test, P Probability, Sen Sensitivity, Spec Specificity, WB Western Blot Test, + reactive test result, − nonreactive test result